PA's linearization using diode

Hi I am doing a PA's linearization using a series Schottky diode connected at PA's gate terminal.
I choose the Avago HSMS280F,and here is the datasheet:
[http://www.avagotech.com/docs/AV02-0533EN]
I am trying to tune the diode to achieve gain expansion and decreasing phase shifting, to compensate AM-AM and AM-PM distortion of my PA.
My schematic is as the attachment.(pic1.png)

After sweep the series R(1k~16k Ohm) and the parallel C(1pF~20pF),
I find when R=15k, C=2pF ,the result can achieve gain expansion and decreasing phase shifting, but the difference is too small.(pic2.png)
(For gain expansion,dB(S21)=-0.13dB@Pin=-20 dBm, dB(S21)=-0.11dB@Pin=20dBm delta=0.02 dB)
(For gain expansion,phase(S21)=4.11 degree@Pin=-20 dBm, phase(S21)=3.97 degree@Pin=20dBm delta=-1.4 degree)
How can I adjust my schematic to have a bigger defference?
I have attach my ADS workspace.(Winspring_wrk.7zads)
Thanks~~

附图/附件

pic1.png

pic2.png

Winspring_wrk.7zads

I expect you will get better results if you include the PA in your simulation, since its nonlinear characterisitics cannot be isolated from this network you are going to connect to its gate.

申明：网友回复良莠不齐，仅供参考。如需专业帮助，请学习易迪拓培训专家讲授的ADS视频培训课程。